题解 | 字符个数统计
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
package main
import "fmt"
func main() {
var s string
fmt.Scan(&s)
cache := make(map[rune]int, 128)
for _, v := range s {
cache[v] += 1
}
fmt.Println(len(cache))
}
